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Sigleo, Anne C., Walter E. Frick, and Lourdes Prieto. "Red alder (Alnus rubra) distribution influences nitrate discharge to coastal estuaries: comparison of two Oregon watersheds." Northwest Science 84 (2010): p.336-350.
Specht, David T., and U.S. National Science Foundation. Energy-Related General Research Office. The use of standardized marine algal bioassays for nutrient assessment of Oregon coastal estuaries In The Proceedings of the Fourth Annual Technical Conference March 14-15, 1974 on Estuaries of the Pacific Northwest. Vol. no.50. Circular - Engineering Experiment Station, Oregon State University, Corvallis no.50. Corvallis, Or.: Oregon State University, Engineering Experiment Station, 1974.